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Finding the Fourth Proportional to 15,085.49, 20,817.09 and 8,370.63

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Solution

The fourth proportional to 15,085.49, 20,817.09 and 8,370.63 is: 11,550.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.49 : 20,817.09 = 8,370.63 : x
  2. Step 2: Convert to fraction form
    15,085.49/20,817.09 = 8,370.63/x
  3. Step 3: Cross multiply
    15,085.49x = 20,817.09 × 8,370.63
  4. Step 4: Simplify right side
    15,085.49x = 174,252,158.07
  5. Step 5: Solve for x
    x = 174,252,158.07/15,085.49
  6. Step 6: Final answer
    x = 11,550.98

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.